If you choose a supplement you can enroll in a Blue Medicare Rx Plan to cover your prescription drugs. To compare plan premiums in your area check out the official Medicare site and enter you State and County to search for Blue Medicare PPO or other Medicare Advantage Plans offered by Blue Cross Blue Shield.
An acetal is a functional group with the following connectivity R 2 C(OR') 2, where both R' groups are organic fragments. The central carbon atom has four bonds to it, and is therefore saturated and has tetrahedral geometry.
Acetal Formation Mechanism. 1  The OH of the hemiacetal is protonated by an acid H-A making it a good leaving group. 2  An electron pair on the-OCH 3 group moves toward carbon, expelling water and giving a C-OCH 3 bond with a positively charged trivalent oxygen.